Diagnostic Instructions

DTC Descriptors

DTC B1335 00: Device Power 3 Circuit

DTC B1335 0B: Device Power 3 Circuit Current Above Threshold

DTC B1335 42: Device Power 3 Circuit Calibration Data Set Not Programed

DTC B1335 4B: Device Power 3 Circuit Calibration Not Learned

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Driver Seat Front Vertical Motor Down Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
Driver Seat Front Vertical Motor Up Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
Driver Seat Rear Vertical Motor Down Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
Driver Seat Rear Vertical Motor Up Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
Driver Seat Horizontal Motor Forward Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
Driver Seat Horizontal Motor Rearward Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
Driver Seat Recline Motor Forward Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
Driver Seat Recline Motor Rearward Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
Driver Seat Lumbar Motor Up Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
Driver Seat Lumbar Motor Down Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
Driver Seat Lumbar Motor Forward Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
Driver Seat Lumbar Motor Rearward Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
Adjustable Pedal Motor Forward Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
Adjustable Pedal Motor Rearward Control	B3920 02	1	B3920 01	B1335 00 B1335 0B
1. Power seat motor inoperative

Circuit/System Description

The memory seat module (MSM) monitors the current supplied to the seat adjuster motors. The MSM can detect both absolute and differential current levels from the seat motors. Absolute current is the maximum allowable current the module will supply to the motors. A differential current mismatch occurs when the current supplied to the seat motors does not match the current returning from the motors.

Conditions for Running the DTC

The MSM establishes that it is not closing to a shorted motor control circuit before the motors are active.

Conditions for Setting the DTC

The following conditions exist for more than 1 second:

B1335 00

Current out of the module does not match the current returning to the module within 5 amps.

B1335 0B

The absolute current or an over-current has exceeded the maximum value allowed.

B1335 42

This DTC will set if the module calibration is not programmed.

B1335 4B

This DTC will set if the module calibration is out of range.

Action Taken When the DTC Sets

The adjustable pedal motor and all driver seat adjuster motors are disabled.

Conditions for Clearing the DTC

Reference Information

Schematic Reference

Connector End View Reference

Electrical Information Reference

Scan Tool Reference

Module Internal Malfunction

If DTCs  B1335 42 or B1335 4B are set history or current, the only option is module replacement.

Circuit/System Testing

1. Use a scan tool to clear the current and history diagnostic trouble code.
2. Ignition ON, while observing the scan tool for DTCs, operate the seat adjuster switch in both directions for each directional motor.
3. Disconnect the suspect seat motor for which the DTC set.
4. Clear the current and history diagnostic trouble code.
5. While observing the scan tool for DTCs, operate the suspect seat motor adjuster switch in both directions.

⇒	If the DTC set current or history, test the motor control circuits for a short to ground, or an open/high resistance. If the circuits test normal, replace the memory seat module.

6. If all circuits/connections test normal, replace the seat motor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.